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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '97d22e6f563610c32c38faf683697328b7d274ca93e2624cfbae4f637b74d8d8' 
  AND token = 'CA+fUHzbzYzfvmEjQUVufkWab9WUdE2fpeWAtvxN8vU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}